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Beta Ti-base five-element alloy

A technology of β-titanium alloy and titanium alloy, which is applied in the field of new β-titanium-based quinary alloys, can solve the problems of difficulty in alloy metallurgy manufacturing and high cost

Inactive Publication Date: 2007-01-03
西安赛特新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the content of the noble metal Nb and Ta alloys is high, not only the metallurgical manufacture of the alloy is difficult, but also the cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Using grade 1 sponge titanium, atomic energy grade zirconium sponge, Al-85V alloy particles and Nb-47Ti alloy chips as raw materials, the alloy material is prepared according to the nominal composition Ti-20Zr-15Nb-2V-0.5Al (wt%). After the alloy material is mixed, it is pressed into an electrode block, and the electrode block is welded into an electrode for smelting by argon arc welding. In the vacuum consumable arc melting furnace, the electrode is smelted twice to form a Φ90 titanium alloy ingot. Melting vacuum is 2×10 -2 Pa, the melting voltage is 32-34 volts, and the melting current is 1400-2200 amperes. The ingot is put into the furnace at 900°C, heated to 1100°C for 2 hours, and then directly drawn and forged. Forged into a 40×40 square bar in one fire. The hot rolling is carried out on a 250 row type. The hot rolling process is to directly roll a Φ8.5 wire rod from a 40×40 square bar after holding the heat for 30 minutes at 950°C.

[0014] After the wire is ...

Embodiment 2

[0017] The preparation method of the alloy wire is the same as above. After the alloy wire is kept at 800° C. for 30 minutes, it is air-cooled to obtain an alloy with upper limit solid solution in the two-phase region. The tensile strength of the alloy is 712Mpa, the yield strength is 585Mpa, the elongation is 12%, and the shrinkage is 62%. After the alloy material of Φ8.0 is welded by the plasma beam welding method, the measured post-weld tensile strength is 680-720Mpa. The alloy of the present invention has very good self-welding properties. After the alloy material of Φ8.0 is butt-welded with Ti-6Al-4V alloy, the welding strength is 570-620Mpa, and the welding coefficient reaches 80-87%. The alloy of the invention has excellent welding performance with Ti-6Al-4V alloy.

Embodiment 3

[0019] The pure metal element is used as the raw material, and the alloy material is prepared according to the nominal composition Ti-25Zr-18Nb-3V-1Al (wt%). After repeated vacuum arc melting for more than 5 times, a uniform alloy ingot is obtained. The alloy ingot is directly cold-rolled into a plate. After the plate is vacuum-coated, it is solid-dissolved at 850°C for 60 minutes, and then air-cooled to obtain a solid-solution alloy in the β-phase region. The alloy had a Young's modulus of 43Gpa, a tensile strength of 582Mpa, an elongation of 23.4%, and a hardness of 235HV. After aging at 450°C, the alloy has a Young's modulus of 74Gpa, a tensile strength of 812Mpa, an elongation of 13.6%, and a hardness of 342HV.

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PUM

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Abstract

The beta Ti-base five-element alloy consists of Zr 15-25 wt%, Nb 15-20 wt%, V 2-6 wt%, Al 0.5-2 wt% and Ti for the rest. Compared with available Ti-Zr-Nb alloy, the beta Ti-base five-element alloy has less Nb and low cost. The beta Ti-base five-element alloy is smelted in a vacuum arc smelting furnace, and is cold or hot machined and heat treated to form plate, rod, wire or other material form. It has low modulus, high elasticity, excellent cold machining performance, excellent weldability, and high performance / cost ratio, and possesses wide application.

Description

technical field [0001] The invention relates to an alloy with low modulus, high elasticity, excellent cold workability and weldability and a preparation method thereof. Background technique [0002] Titanium and titanium alloys have been widely used in aerospace, chemical, medical and other fields due to their high specific strength, good corrosion resistance, and excellent biocompatibility. However, as a biological material and a highly elastic material, the elastic modulus of titanium alloy is relatively high, and the Young's elastic modulus of general titanium alloy is 100-120Gpa. The modulus of the most widely used titanium alloy Ti-6Al-4V is 115Gpa, and the alloy has poor cold workability. Therefore, low-modulus titanium alloys have become a research and development hotspot in recent years, and a variety of new low-modulus titanium alloys have been developed at home and abroad. Among them, alloys of the Ti-Zr-Nb series have attracted attention due to their excellent c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/00C22C30/00
Inventor 杨冠军杨华斌曹继敏杨宏进王廷询牛中杰高维娜
Owner 西安赛特新材料科技股份有限公司
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